化工学报2016，Vol.67Issue(9)：3559-3565,7.DOI:10.11949/j.issn.0438-1157.20160015
朝下沟槽结构表面池沸腾换热
Saturated pool boiling from downward facing structured surfaces with grooves
摘要
Abstract
In-vessel retention is a key severe accident management strategy now widely adopted by some nuclear power plants. The saturated pool boiling heat transfer coefficients and critical heat flux (CHF) were measured from downward facing structured surface with grooves in deionized water to enhance the CHF. The orientations were 5°, 30°, 45°, 60° and 90° (vertical). The results showed that the nucleate boiling heat transfer coefficients and the local CHF for structured surface with grooves were consistently higher than those for plain surface. Compared with plain surface, the CHF increase could reach 65%—90% for structured surface. The vapor blanket and wavy vapor layer bubble structures with different CHF trigger mechanisms on the downward facing surface at high heat fluxes were observed on structured surface. The enhancement of the local CHF and the nucleate boiling heat transfer coefficients was mainly due to the significantly increase of heat transfer area and the grooves that effectively improve surface wettability.关键词
传热/表面/相变/气泡/临界热通量/倾角Key words
heat transfer/surface/phase change/bubble/critical heat flux/orientation分类
化学化工引用本文复制引用
钟达文,孟继安,李志信..朝下沟槽结构表面池沸腾换热[J].化工学报,2016,67(9):3559-3565,7.基金项目
大型先进压水堆核电站重大专项子课题项目（2011ZX06004-008）；国家重点基础研究发展计划项目（2013CB228301）。@@@@ supported by the National Science and Technology Major Project of China (2011ZX06004-008) and the National Basic Research Program of China (2013CB228301) （2011ZX06004-008）
